Highly Elastic Slide-Ring Hydrogel with Good Recovery as Stretchable Supercapacitor

Area of Science:

• Materials Science
• Polymer Chemistry
• Nanotechnology

Background:

• Slide-ring gels offer excellent mechanical properties and stability.
• Their complex synthesis hinders widespread application.
• Developing simpler methods is crucial for broader use.

Purpose of the Study:

• To synthesize a slide-ring hydrogel with improved elasticity and recovery.
• To simplify the synthesis process of slide-ring gels.
• To explore the application of the novel hydrogel in energy storage devices.

Main Methods:

• Constructed a polypseudorotaxane using 6-acrylamidomethylether-modified α-cyclodextrin (αCDAAmMe) and PEG20000 diacrylate (PEG20000 DA).
• Utilized photo-initiated in situ polymerization of acrylamide with the polypseudorotaxane.
• Fabricated stretchable and compressible supercapacitors using the hydrogel with carbon nanotube paper electrodes.

Main Results:

• Achieved a slide-ring hydrogel with high elasticity (stretchable up to 22.5 times) and rapid, reversible recovery.
• The resulting supercapacitor exhibited ionic conductivity of 17.0 mS cm⁻¹ and capacitance of 0.87 μF cm⁻².
• Capacitance of the supercapacitor showed enhancement under stretching.

Conclusions:

• A facile synthesis route for slide-ring hydrogels was established.
• The novel hydrogel demonstrates potential for advanced energy storage applications, particularly in stretchable electronics.
• The material's properties can be tuned, offering further possibilities for device optimization.